import { Iterator } from "../../lazy";
import { Options } from "../../types";
import { SetWindowFieldsInput } from "../window/_internal";
/**
 * Groups documents into windows and applies one or more operators to the documents in each window.
 *
 * See {@link https://www.mongodb.com/docs/manual/reference/operator/aggregation/setWindowFields/ usage}.
 */
export declare function $setWindowFields(coll: Iterator, expr: SetWindowFieldsInput, options: Options): Iterator;